"Apple this week released macOS 10.13 "High Sierra" as the
latest version of its operating system. Of course, curiosity got the
best of me so here are benchmarks of macOS 10.12.6, macOS 10.13, Ubuntu
16.04 LTS, and Ubuntu 17.10 from a MacBook Air to see how the
performance compares."

Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips